Apparatus for treating air to be used in drying



(No Model.)

- R. S. JENNINGS.

APPARATUS FOR TREATING AIR TO BE USED IN DRYING. No. 303,164.

Pqtented Aug. 5, 1884.

9% I M J 6 4/; 4

UNIT D STATES PATENT APPARATUS FOR TREATING AIR'TO BE'USEDIN DRYING.-

SPECIFICATION forming part of Letters Patent No. 303,164, dated August 5,1884.

Application filed March 8, 1883. (No model.)

To all whom it nuty concern):

Be it known that I, RALPH S. JENNINGS, a citizen of the United States, residing at Boston, in the county of Suffolk and State of 5 Massachusetts, have invented certain new and useful Improvements in Apparatus for Treat' ing Air to be Used in Drying, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improved process and apparatus for withdrawing moisture from air. The method or process is one purely mechanical that is to say, does not re- I quire the use of any chemical agents of a hygroscopic nature-such as sulphuric acid or -]ime--and thereforcthe air isleft pure. Heretofore it has been customary to employ iron tubes for condensing moisture from the air,

said tubes being adapted to have currents of water passed through them for the purpose of keeping them cooled. The tubes have been of the character of ordinary gas-tube, being drawn or lap-welded, and therefore are necessarily made of comparatively thick metal. Hence the cost of a condensing apparatus of this sort has been very great, for it is well known that it requires a large number of feet of tubing to make a condenser of any appreciable efficiency.

One of the objects of my invention is to provide a much cheaper, and at the same time a more efficient, apparatus for this purpose of removing moisture from an.

Figure l is a top plan view of an apparatus embodying my improvements. Fig. 2 is a vertical longitudinal section of the apparatus, in which the air is cooled by means of currents of other air. Fig. 3 is a similar viewof a cooler in which use is made of a liquid re 0 frigerant. In the drawings, A represents a furnace or heating apparatus. I

B represents, generally, a cooling apparatus having tubes through which air passes as a cooling agent. i

0 represents a cooler having tubes through which passes a liquid refrigerant.

D represents a fan for inducing a current of air through the {LllOVClllBUillOllfid parts.

E E are dry-rooms, and F G the ducts,

through which the air passes from the fun to said rooms.

through the furnace or heater to the cooler B. I is a duct, which connects the cooler B with the cooler G, and J the one connecting the latter with the fan'D.

B Fig. 2, represents a chamber or duct, which may, if desired, be utilized to collect the air that rises in the air-cooler, in order that it may be carried to the heater for a subsequent heating, as clearly shown in my application No. 65,006, filed J one 23, 1882.

M represents a duct communicating with the duct H near the furnace, and communieating with the fan D at a point beyond the cooler 0,, and through this duct M the air can coolers.

It is sometimes desirable to heat a dryingroom to a comparatively high temperature, even when said room is to be subsequently used for the drying oi articles which cannot be subjected to a high heat. Thus, in cold weather it is necessary, when starting the appa-ratus, to bring the temperature of the dryeasily by cutting the air off from the ducts directly through the duct M. I 0 represents a damper, by means of which the duct H can be closed, and m a similar damper for. thc'duct M.

The coolers are used to temper the air when delicate materials are being dried, or when it is not desirable to deliver air at a high temperature to the drying-room; and the direct passage through the duct M is used when a a higher degree of heat is essential.

The cooler Bliss a suitable number of pipes, b, situated therein, they being supported at the upper ends in a partition across the cas ing of the cooler,

admission of air to the H is a duct, through which air passes be carried without its passing through the .ing-room up rapidly, aud't-his can be done which run through the coolers and taking it.

and the lower ends being held in a similar partition at or near the bot- Y the lower chamber can be provided of any suitable -number,

xo perature,

\ 5 At 02 there is a damper in the duct I, by means of which the air can be prevented from passing through said duct and caused to pass through'the duct K, directly to the fan D.. In winter or when the air is at a low temthe cooling or condensation effected in the apparatus at B will be found sufficient for many purposes; but in the warmer parts of the year, when the temperature, of the air is higher, I have found it advantageous to combine with the cooler described another of the charactershown generally at O and illustrated in detail in Fig. 3. At the top and v the air can be taken directly bottom it is provided with water-tight chambers or duets with which communicate pipes (Lsecured at the upper ends in a diaphragm, O and at the lower in a diaphragm, O Water, or ice and water, are placed in the upper compartment, and as the water ,flows down through the tubes 0 the air passing through the cooler is affected thereby, the water being received in the lowermost chamber below the diaphragm c I do not in this case claim any of the matthe claims in my other pending applications, Serial Nos. 65,006, 86,026, 86,318, 86,319, 121,265, 87,469, 121,424, 98,699, 73,148, and 97,493, claim the matters which are specifically set forth in the following claims: A

ter's set-forth in preferring in this case to 35 \Vhat I claim is 1. In aii apparatus for treating air, the

combination of a water-cooler, an air-coolerprovided with two {independent ducts, one

2. In an apparatus for treating-air to be v used. in a drymg-room, the combination of the following elements, namely: an air-heater, an air-cooler, a duct for taking air from the heater to the cooler, a duct fortaking the air from the cooler tot-he drying-room,

I from the heater to the drying-room independently of the cooling apparatus, and suitable controlling-dampers, substantially asset forth.

3. .In an apparatus for treating air, the combination of a furnace or air-heater, a duct which takes the air froin the furnace, a cooler having ducts through which passes cold air, said cooler communicating with the duct from the furnace, a duct leading from the cooler to the drying-room, and dampers adapted to shut off more or less of the air, which effects the cooling of the heated air, substantially as set forth.

In testimony whereof Iaifix my signature in presence of two witnesses.

Witnesses:

O. E. PRATT,

H. I. NASH.

the water-cooler or dia duct by which RALPH S. JENNINGS: 

